Because doing chores is not a complete waste of time. It's a mild physical activity and at the very least some rest for the brain and they eyes from the glowing screen.
As for who decides what is hedonism and what is a necessity? I think the society does - in a soft way. When people see others adopt more discipline and shun convenient doodads for slightly more physical work the society as a whole becomes a bit more badass.
I personally would rather bike and walk everywhere. Even if it takes longer and exerts more effort. If some day the majority sees it my way the society as a whole starts to soft push in that direction by altering the city infrastructure to be friendlier to bikes and pedestrians and less accommodating to cars. That's just one example.
Doing your dishes in the sink may feel like a terrible chore if you grew up with a dishwasher. I did not. I can live without one just fine. The benefit is that you get a bit of zen time away from the screen and there is no dishwasher to break and leak every few years.